Angle of attack and Angle of incidence

Angle of attack noun - The acute angle between the direction of the undisturbed relative wind and the chord of an airfoil.

Angle of incidence and angle of attack are semantically related. In some cases you can use "Angle of incidence" instead a noun phrase "Angle of attack".

Angle of incidence noun - The angle that a line makes with a line perpendicular to the surface at the point of incidence.

Angle of attack and angle of incidence are semantically related. Sometimes you can replace phrase "Angle of attack" with "Angle of incidence", this phrases are similar.